Former Owner
- Ampleforth Abbey1
- Anderson Galleries1
- Andrea della Valle1
- André de Rineck1
- Anne of Brittany1
- Antiquarian Books of Boston1
- Antoine Joseph Rérolle1
- Antoine de Court1
- Antoni Jerzy Apponyi1
- Antonio Assemani1
- Antonio Dominico Restis1
- Antonio de Bonius1
- Arnold Jansen op de Haar1
- Art ancien S.A.1
- Arthur Brölemann1
- Arthur Kay1
- Arthur Liddell, 5th Baron Ravensworth1
- Arthur M. Ellis1
- Augustinus de Cagnolis1
- Austin, Jehan1